Exploiting Global Grid Structure to Support MobileSinks in Large Scale Wireless Sensor Networks

• Main Authors: Kuo-Hua Kao, 高國華
• Other Authors: SingLing Lee
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/09165079244876872223

碩士 === 國立中正大學 === 通訊工程研究所 === 94 === We propose a novel data dissemination scheme in large-scale sensor network in which a global grid structure is exploited to support good mobility for multiple sink nodes and multiple source nodes. Our method reduces energy consumption by avoiding query flooding. In addition, a sink node can easily collect the data through the information of source nodes stored in the emph{forwarding fields} which is a rectangular region in the central area of each grid. Our method also achieves energy efficiency during query forwarding stage and data delivering stage. Overhead analysis shows that our method consumes less energy compared to recent proposed methods such as two-tier data dissemination (TTDD) [3] and Railroad [6]. Our results also show that forwarding fields have resolved the energy consumption problem of query forwarding from sinks and data delivering from sources with the remarkable performance. Finally, we implement our method in J-sim [11]. Based on the simulation results we show that the selection of an appropriate forwarding field size may reduce the energy consumption dramatically. Overhead analysis and simulations are used to validate our analysis for the performance of the proposed method.